PWM may refer to:
Science and technology Position weight matrix, a representation in motifs in biological sequences Pulse-width modulation, a technique for controlling the average power delivered by an electrical signal PWM (window manager), a Unix-based X window manager
Other uses Panzerwurfmine, a type of German anti-tank hand grenade Portland International Jetport, an airport in the U.S. Professional Wealth Management, a financial magazine Permanent Way Machine, the British Rail Class 97/6 locomotives Polskie Wydawnictwo Muzyczne, the Polish Music Publishing House